Which of the following orders is correct?

(1) SbH3>NH3>AsH3>PH3 – Boiling Point

(2) NH3>PH3>AsH3>SbH3  – Thermal Stability

(3) NH3>PH3>AsH3>SbH3  – Basic Character

(4) NH3>PH3>AsH3>SbH3  – Bond Angle

(A) (1), (2) and (3) only                             (B) (2), (3) and (4) only

(C) (1), (3) and (4) only                             (D) (1), (2), (3) and (4).

Concept Videos :-

#2 | 15th Group: Properties: II
#3 | 15th Group: Ammonia

Concept Questions :-

group 15 ,preparation and properties

(C) (1) NH3  has higher boiling point than AsH3 and PH3  on account H-bonding. SbH3 has highest boiling point on account of highest molecular weight.

(2)  As the size of element increases, the strength of M–H bond decreases and thus stability decreases.

(3) Basicity decreases down the group. (Drago rule).

(4) HEH angle ° : NH3 = 107.8; PH3 = 93.6, AsH3 = 91.8; SbH3 = 91.3.

Difficulty Level:

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